html, body, div, img, h1, h2, h3, h4, h5, button {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  //overflow: hidden;
}

.canvas-area {
  position: relative;
  top: 0;
  left: 0;
  overflow: hidden;
  float: left;
}

.canvas {
  display: inline-block;
}

.learn-functional {
  border: 1px solid #999;
  float: left;
}
